Vaporizing type liquid fuel burner



April 17, 1951 c. YvELlN VAPOIZING TYPE LIQUID FUEL BURNER 2 Sheets-Sheet l Filed Feb. 20. 1948 April 17, 951 c. YVELIN VAPORIZING TYPE LIQUID FUEL BURNER 2 Sheets-Sheet 2 Filed Feb. 20, 1948 l ..\M l

Patented Apr. 17, 1951 Charles Yvelin, Vernon, France Application February 20, 1948, Serial No. 9,649

In France November 28, 1945 Section' 1, Public Law 690, August 8, 1946 Patent expires-November 28, 1965 My invention has for its object a liquid fuel burner of the type including a chamber with Vertical side walls and downwardly sloping pipes mounted in said walls and adapted to feed primary air of combustion into the burner through the walls thereof together with further means for feeding the secondary air and the fuel oil into the burner.

The object of my invention is to provide for the arrangement of the primary air feeding pipes in side by side relationship in av manner such that they lie under different angles with reference to horizontality and produce thus jets converging substantially towards the central part of the burner chamber. As a consequence of this arrangement, the sprays of primary air while angularly shifted with reference to one another, crowd against each other towards the center of the pot so as to provide a better-splitting of the layer of oil at the bottom of the pot.

My invention has thus for its further object a pot wherein the mixture is commingled and atomized perfectly, the mixing being operated energetically by the jets of primary air arriving along diiferent angular directions.

In the accompanying drawings that show an embodiment of a burner in accordance with the invention:

Fig. 1 is a longitudinal View taken partly in section through the line I-I of Fig. 3;

Fig. 2 is a lateral View taken on the delivery side of the fuel oil.

Fig. 3 is a lateral view on the side opposite to the oil delivery.

Fig. 4 is a section through 4-4 of Fig. 2 passing through pipe C.

Fig. 5 is a section through line 5--5 of Fig. 3 passing through pipe D.

Fig. 6 is a section through line 6-6 of Fig. 2 passing through pipe E.

The burner is made up of a metal pot of rectangular shape with a bottom wall or atomising plate or base plate I and side walls 2 and 3 constituting faces or supports for nozzles, and connected by two other, longitudinal walls tnt. This pot is packed round with suitable lagging the object of which is to keep the burner at red -heat so as to ensure the combustion of fumes and any residues and thus increase its eliiciency. It is capped by two sloping thick cheek plates for heat storage l- (Fig. 1) tted together by two lateral inclined plates l-it provided with apertures Il and carrying a nozzle l2 for the exit of the flame in connection with the customary heating means.

zlolaims. (o1. iss-91) 'I'he front wall 2 includes a series of YpipesV A-C-C-E-E (Fig. 2). The feed pipe Y, connected to the oil tank (not shown) is inf serted in the `discharge 'pipe A (Fig. 1).

The rear wall 3 (Fig. 3) is provided with a series of pipes B-D-D. The pipe B is in communication, through an aperture b (Fig. 1) cut in its wall, with a tube M opening into the waste` oil cup m into which the pipe 2 dips at a small distance from the bottom ofthe cup, saidfpipel" being also linked up with the oil feed (not shown). It must be emphasized that the axes of all the pipes A--B--C-D-E intersect at different angles the base plate I of the pot. Thus A forms an angle of 18, B of 12, C of 25, D of 12 (Fig. 5) and E of 25 (Fig. 6) like C. In this way, the sprays, while operating one runder the other, end by crowding against each other due to their varying slope.

The burner operated in the following manner: the pipe A receives the oil, drop by drop, through the small aperture a, coming through the feed pipe Y; the oil spreads out in front of the discharge of the pipe A. For starting the burner, the oil is lit by hand, then, after a few minutes, the feed is increased and when the burner is hot enough, the feed delivery is adjusted. When the burner is running on low re, the fuel oil settles at the lower part of the discharge end of pipe A, theI pipes E head the air for combustion on to the residual material spread out round this pipe A, causing the burning of the oil thus collected; in this way is avoided any accumulation of cinders that may occur if the burner runs for too long a time on slow fire. When the burner is hot enough and after the volume of feed is increased, there is obtained a strong suction through the air pipes, the oil follows the upper portion of pipe A and is thrown into the middle of the pot bottom.

The air from the pipes A--B splits up the layer of oil deposited on the base plate and fills up, t0- gether with the light fumes of combustion, the middle portion of the burner from the base plate to the discharge end of nozzle I2; the upper portion of the burner, tapering towards the nozzle, restricts the output end of the flame and constitutes an atomising chamber between the middle portion and the walls of the burner. The fumes produced in these portions are mixed vigorously by the primary air through tubes C--D due to the Varying slope of their axes with reference to the base plate. Combustion is iinished off by meeting the secondary air that has been at the point i a ture b, flows along the tube M, fills the waste-oil cup m and chokes the air pipe Z from the oil tank, and this prevents air at atmospheric pressure from acting on the oi1 contained in the tank; the latter is closed hermetically with a plug. Emptying of the Waste-oil cup m allows the starting "up of the burner as well as the oil feed arrangements. What I claim is:

l. A burner for operating on fuel oil for feeding hot gases to external heating means comprising a metal pot with two opposite substantially vertical walls, at least two series of downwardly sloping pipes mounted in' said walls and adapted to feed primary air of combustion .into the pot through said walls and arranged Aside by side un der different angles with reference to horizontality for producing jets converging substantially towards the middle of the bottom of the pot, means for feeding secondary air into the pot and meansk for feeding fuel oil into the end of at least `one of the sloping pipes through the wall thereofA 2. In a liquid fuel burner including a chamber with vertical side walls, downwardly sloping pipes t Number mounted in said walls and adapted to feed primary air of combustion into the burner through the walls thereof, and arranged side by side under different angles with reference to horizontality for producing jets converging substantially towards the central part of the burner chamber, means for Afeeding secondary air into the burner and means for feeding fuel oil into the end of at least one of the sloping pipes slightly ahead ofthe point of opening thereof into the burner chamber.

t CHARLES YVELIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name n Date 892,706 Blubaugh July 7, 1908 1,807,247 Meredith May 26, 1931 1,912,713 Kresky r ag.. 1 r June 6, 1933 2,261,814 Suchland 1. Nov. 4, 1941 2,432,143 De Lancey Y Dec. 9, 1947 FOREIGN PATENTS Number Country Date 1,695 Great Britain e .A Y -of '1868 462,414 Great Britain Mar. 9, 1937 478,780 Great Britain Jan. 25, 1938 594,947 France July 6, .1925 828,121 France 1 Feb. 7, 1938 

